ARM: 5638/1: arch/arm/kernel/signal.c: use correct address space for CRUNCH

preserve_crunch_context() calls __copy_to_user() which expects the
destination address to be in __user space. setup_sigframe() properly
passes the destination address.

restore_crunch_context() calls __copy_from_user() which expects the
source address to be in __user space. restore_sigframe() properly
passes the source address.

This fixes {preserve/restore}_crunch_context() to accept the
address as __user space and resolves the following sparse warnings:

arch/arm/kernel/signal.c:146:31:
warning: incorrect type in argument 1 (different address spaces)
expected void [noderef] <asn:1>*to
got struct crunch_sigframe *frame

arch/arm/kernel/signal.c:156:38:
warning: incorrect type in argument 2 (different address spaces)
expected void const [noderef] <asn:1>*from
got struct crunch_sigframe *frame

arch/arm/kernel/signal.c:250:48:
warning: incorrect type in argument 1 (different address spaces)
expected struct crunch_sigframe *frame
got struct crunch_sigframe [noderef] <asn:1>*<noident>

arch/arm/kernel/signal.c:365:49:
warning: incorrect type in argument 1 (different address spaces)
expected struct crunch_sigframe *frame
got struct crunch_sigframe [noderef] <asn:1>*<noident>

Signed-off-by: H Hartley Sweeten <[e-mail]>
Signed-off-by: Russell King <[e-mail]>

arch/arm/kernel/signal.c

···
 }
 
 #ifdef CONFIG_CRUNCH
-static int preserve_crunch_context(struct crunch_sigframe *frame)
+static int preserve_crunch_context(struct crunch_sigframe __user *frame)
 {
 	char kbuf[sizeof(*frame) + 8];
 	struct crunch_sigframe *kframe;
···
 	return __copy_to_user(frame, kframe, sizeof(*frame));
 }
 
-static int restore_crunch_context(struct crunch_sigframe *frame)
+static int restore_crunch_context(struct crunch_sigframe __user *frame)
 {
 	char kbuf[sizeof(*frame) + 8];
 	struct crunch_sigframe *kframe;